Spring assembly for mattresses or cushions



L. A. suEKoFF 1,776,400

SPRING ASSEMBLY FOR MATTRESSES OR CUSHIONSl Filed July 26, 1930 5 Sheets-Sheet Sept. 23, 1930.

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sept. 23, 1930. L, A, SUEKOFF 1,776,400

SPRING ASSEMBLY FOR MATTRESSES OR CUSHIONS Filed July 26, 1950 5 Sheets-Sheet 2 Sept. 23, 1930. A SUEKOFF 1,776,400

SPRING ASSEMBLY FOR MATTRESSES OR CUSHIONS Filed July 26,A 1930 5 Sheets-Rham.

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SPRING ASSEMBLY FOR MATTRESSES 0R CUsHIoNs Filed July 26, 1930 5 Sheets-Sheet 4 Irufenr Louis AJueof Sept. 23, 1930. L. A. s UEKol-F 1,776,400

SPRING ASSEMBLY FOR HATTRESSES OR CUSHIONS Filed July 26'. 1950 5 Sheets-Sheet Patented Sept. 23, 1930 PATENT OFFICE LOUIS A.. SUEKOFF, F WILMETTE, ILLINOIS SPRING ASSEMBLY FOR MATTRESSES 0R CUSHIONB Application filedv 4July 26,

l0 form a continuous chain of the same.

In making up spring assemblies, a chain of these spring-filled housings is usually folded zig-zag upon itself to cover a given area corresponding substantially with that of the seat l cushion or mattress into which said springs are to be incorporated, the said chain of housings being generally suitably hand-stitched along their upper and lower surfaces to prevent unfolding thereof and crowd the housings together Where required, and, after insertion of the spring assembly thus formed and insertion of the same into a cover fabric Alined with suitable padding, said assembly is further secured in place by means of tufting and, in some instances, roll-edge stitching passing through peripheral corner portions of ofsaid assemblies.

The resulting structures have been generally satisfactory so that they have met with o great commercial success but have, in many instances, been found deficient in that one or several of the springs and cells containing the same have become turned out of vertical into canted or horizontal position and thus cause hollows to form in the surfaces of the mattresses'or'cushions and, furthermore, and particularly in mattresses, said springs and cells tend to gradually crowd together and away from the boxing or peripheral. walls of the cushion or mattress cover thus rendering the latter slack and causing the corner portions or roll-edges to sag.

To correct these defects, it is necessar to remove the spring assembly and paddlin from the casing, stretch the assembly back to normal shape and readjust the position of displaced springs, all of which, including the evening up of padding, replacing the latter and said assembly in the cushion cover, etc., constitutes rebuilding 'of the structure at 1930. Serial No. 470,806.

a veryV appreciable expense, all of this being due to the fact that springs or housings containing themhave not been adequately secured against relative movement and displacement in the assembly nor with respect to the padding and coverl fabric.

The main olbject of the present invention is to provide a spring assembly of the ty e specilied wherein the springs and their liousings are firmly held in proper relative ositions with relation to each other, the pad ing and the housing, so that a completed cushion or mattress containing the assembly will not suffer the defects above described. Another object of the invention is to provide a spring assembly of the type specified whereinv the several springs may be variously spaced and arranged relatively to each other and greatly varied in this respect from the conventional arrangement of said springs and housings as now and heretofore generally practiced.

In the accompanying drawings illustratin the invention in several exemplary embodlments. l

Fig. 1 is a top plan view, partl in section, of a spring assembly constructe in accordance with the invention.

Fig. 2 is a fragmentary vertical sectional view of the same.

Figs. 3 and 4 are views'similar to Figs. 1 and 2, respectively, showing a modified form of construction.

Fig. 5 is a plan view, partly in section, of still`another modified form of construction of the assembly.

Figs. 6 and 7 are, respectively, a plan view partly in section, and a vertical longitudinal section of still another modified form of construction of the assembly.

Figs. 8 and 9 are fragmentary sectional views of the assembly illustrative of the method of making the same.

Fig. 10 is a view similar to Fig. 1 illustrating a further modification of the structure of the invention.

Fig. 11 is a fragmentary vertical sectional View illustrating a further modified form of construction.

Fig.i12 is a perspective sectional view of the same.

. Fig'. 13 is a fragmentary perspective viewof a chain of spring-filled housings.

The structural c aracteristics of the'spring assemblies of this invention will be most readily' understood by first describing the method of makingthe same. s l

This consists in first laying twostrips of fabric upon' each other and joining them by stitch-chains extending transversely to thev longitudinal edges of said strips in thewellknown conventional manner, these initial steps not being herein illustrated; These initial steps provide a series of iiat housings or receptacles for springs and are open at bothends. It has, however, been customary in this art to'fold a single strip of yfabricupon itselfmidway of its longitudinal edges to produce pockets or housings open only at one end, this form being advantageous in the instant case to produce certain types of assemblies as'hereinafter fully described and may be used Vfor all the several types of assemblies herein "illustrated, though in the main, the pockets or housings open at both ends arey better adapted to the purposes of I'this invention. l l

Having thus first completed a chain of said kets or housings 1, preferably open -at hghh ends, the iirst actual ste s of the present invention are performed as ollows:

A sheet 2 of a suitable fabric such as cheesecloth, muslin, cotton duck, or burlap, for example, is placed upon the table of a sewing machine. This sheet 2 preferably bears a series of `parallel lines imprint of said s eet and constituting guidesaid sheet 2. It will be understood', of course,

that saidedge portions of said chain or strip or, in other words, the mouth rtions of the pockets or housings 1 thereo will be gath- 4 ered vto the extent necessary to shorten them to correspond substantially with the diameter of the helical springs 4which` they are to contain.

This operation is repeated until the mouth `portions of the ockets o f each of aA roup of said; strips or e ains thereof have een secured to the sheet 2 by means ofstitch-chains coincident with the said guide-lines.

The pockets .1 are stil'l'open at their other ends and as, inthe majority of instances, the said pocketsy or housings 1 are interposed between thetop and 'bottoml fabric walls of a pple s thereon, said lines bein generally parallel with an' lcompressing the'springs 4 and then inserting the same into the pockets 1 transversely of their ultimate and normal positions in the lat-- ter, the length of said springs being far l greater thantheir diameters. y I

By thus positioning the springs-1 in said pockets or housings 1 as far as possible from the olpen ends ofthe latter, there will be amack fabric at said open ends to permit the mouth ortions of said pockets to be secured by stitch-chains 5 to al second sheet 6 of fabric as shown in Fig. 9.

To effect this, the fabric sheet 2 is inverted, the fabric sheet 6, similarly provided with guide-lines, is then lplaced upon. the sewing lmachine table and the fabric sheet 2 folded substantially asshown in Fig. 8 to permit stitchin of an open end portion of each of the poc ets 1 to said sheet 6 successively, thereby to close the open ends of said pockets or housings` at the same time that they are secured to the sheetA 6.

The spacing of the stitch-chains 3 and 5, respectively, may be. equal to, slightly less, or appreciably greater than, a distance e ual to the diameter of said springs 4 which, a ter the pockets or housings 1 containing the same have been secured to the sheet-.6, are turned through an arc of ninety degrees to a position wherein their longitudinal axes are coincident with those of said pockets or housin 1 which they snugly iit and expand to cy drical form. The springs 4 are usually of g'lreater'length than the expanded pockets or ousings 1 so that they remainl slightly compressed and sve toform substantially `flat circular fabric en d walls for said pockets or housings 1.

' It Will-be noted that-fin said drawings, I have shown layers 7 of suitable iibrous paddingsuch as-hair, cotton, sisal, for example, disposedupon the outer Afaces of said sheets 2 and 6 and have shown the stitch-chains 3 and 5 as extending through said layers 7 of padding, the latter being compressed by said -stitch-chains. Thus the stitch-chains`3 and 5 serve also Athe third functionof securing padding layers 7 to thesheets 2 and 6.

In practice and for reasons hereinafter4 particularly set forth, the said vpaddin layers 7 are lirst secured to the sheets2 and 6 by 'means of parallel stitch-chains 8 extending transversely of the stitch-chains 3 and 5.

.In theevent of attachment of the pockets or housings 1 to the fabric Asheets 2 and 6 only, as by omission of the vpaddin layers 7, or in event of inclusion of the hitter, the

springs 4 contained in said 'attachedvpockets or housings will be held in spaced relation to each other, especially with respect to preventing crowdm together thereof beyond the extent to whic the stiffness or tautness of the fabric sheets 2 and 6 will so function.

, The layers of padding 7 obviously serve as a stiflening formation to resist crowding together of said springs. To prevent this crowding or to limit the same to the extent desired as in instances where the stitch-chains 3 and 5, respectively, are spaced from each other a distance slightly less than the diameter of the springs 4, the fabric sheets 2 and 6 and the padding layers 7 must be maintained stretched to a suiiciently taut condition. This is effected by means of the conventional border-frame 8", usually of fairly heavy wire, suitably secured to the "peripheral edge portions of said sheets 2 and 6 and preferably, in the instant case, also secured to the padding layers 7. In most instances the said peripheral edge portions of said sheets 2 and 6 and said padding layers 7 are of such width as to provide free portions 9 outwardlyA of the border-frames 8 to provide what may Ibe aptly termed boxing portions joined'to form a peripheral wall about the spring assembly.

"From the foregoin it will be apparent that the spring assem ly presents cooperating means whereby the springs-are firmly and permanently maintained in predetermined relative positions from which they can no t be displaced otherwise -than by partial destruction of the Whole structure.

In instances where the padding layers 7 are used andthe springs 4 closely grouped so that the pockets' or housings 1 thereof are' all in surface contact with each other, the Said border-frames 8* may be omitted because said padding layers 7 are rendered suiliciently resistant by the compression along the stitch-chains extending transversely of each other through the same and the resulting compression of padding thereby, to resist crowding together of said springs thus particularly adapting the assembly thus formed for incorporation into mattresses wherein no border-frames may be used. Said padding la ers are, however, sufliciently tlex' ible to yiel readily to surface pressures compressing certain grou s of said springs so that they are ideally a apted to the purposes of the present invention'.

The invention defined either in' terms of method or of structure, permits of a wide range of relative position or grouping of springs which, insofar as I am informed, has not-heretofore been commerciall pos sible with this general type of articulate spring-containing cell structure. A few ex emplary relative arrangements of springs and their housings are shown in the drawings, the heretofore conventional arrangement thereof being best illustrated inv Fig. 5 wherein the springs of one strip are disposed in staggered relation to those of the next adjacent strips this arrangement requiring the maximum number of springs of a given dif vameter to cover a given area.

The relative arrangement of springs and `their housings shown in Figs. 1 and 2 per- 't1ve arrangement of said springs and can be produced at appreciably lower cost.

As shown in Figs. 3 and 4, the strips 10 of spring casings 11 may be constructed to cause said casings 11 vto be spaced from each other by means of the parallel spaced stitchchains' 12 as shown, and said strips spaced from yeach. other, said respective spacings being 'such as to provide room for the unhoused springs 14 which are easily inserted after completion of the remainder of the assembly but before peripherally closing the same. i

A further advanta e of the invention resides in its adaptability to variation for the construction of seat cushions of various types as, for example, .automobile seat-.cushions which are high at the front and low at the rear, as shown in Figs.6 and 7. For this type lof structure the housings 5of successive strips 16 are of successively decreasing depths and may be relatively arranged as shown in Figs. 1 or 3 or 5, or in any other manner desired. In this type of cushion the base usually consists ,of a wire grid structure f 16 to which the bottoms of the pockets or lhousings are suitably secured in proper positions relatively to each other. In the manufacture of this type of cushion it is preferable to form the articulate pocket or housing structure of a strip of fabric folded upon itself so that the resulting receptacles for the springs will be open at one end only and willr be closed at said ends after insertion of the springs by stitch-chains extending through the cover fabric of the assembly.

In the' structures shown and described, the springs of the pockets or housings surroundmg or adjoining any given one of the latter will, byv reaction upon relief of load elongate such one of saidfhousings wherein the spring may have been displaced under the influence of the load and will thus cause said spring to resume its normal position, this being due to the fact that the cover fabric of the assembly is so attached to each spring-housing as to cause the latter to be lifted as the cushion is relieved of load. By so relatively arranging the springs and housings as to avoid the crowding above referred to, each spring is afforded eater freedom of action and given room su cient to permit it' to, resume its normal position besides roviding access to the hand to reach any displaced sprin by merely opening up one side or end cfg the cushion casing.

It will be obvious that the action described in the next preceding paragraph is quite different from that of the springs of the con Ventional type of assembly which is held in place in the outer casing by the tufting as above indicated.

A particularly advantageous relative ar rangement lof the springs and pockets is shown in Fig. wherein the several artcu late pockets or housings structures extend diagonally of the top and bottom wall structures thus eliminating the alternate unfilled spaces 17 of Fig. 5 adjacent the boxing of the structure whiie also permittingv a very close or a spaced grouping or relative arrangement of the' springs as desired, the strips or chains of said spring pockets or housings of Fig. 10 being either of the type shown in Figs. 1 and 2, or thetype shown in Figs. 3 and 4.

The term stitch-chains, as usedwin this specification, shali be construed to include hand or machine sewing or any other .type

of fastening means adapted to the purposes of the invention.

In practice, the spring assemblies are preferably made to include the padding layers.`

These present rough outer faces having corrugations or biscuit formations, the surfaces of which present loose fibres and loose ends of libres, all of which contribute to hold in place additional padding, such as short fibre cotton or the like, interposed between said padding and the cushion or mattress covers without resort to tufting. This additional padding obviously intetwines its fibres with those of the padding layers of the assembly and is sufficiently compact to reinforce the said padding layers of the assembl to increase the normal resistance of the atter to contraction under the influence of pressures` against the peripheral walls or edges of the cushion or mattress and consequent crowding togetherV of the springs thereof.

A further important modification of both the structure and method of this invention is illustrated in Figs. 11, 12, and 13.

By reference to Letters Patent No. 1,733,660, and No. 1,566,068 and possibly others, it will be noted that the general practice in this particular art is to insert the springs transversely of their normal positions into the open mouths of the chain-pockets formed by folding the fabric strip upon Aitself and inserting the cross-stitch-chains to form the pockets and then, after insertion of said springs, to run a stitch-chain through the opposed walls of the mouth portions of said pockets to close the same. the first-mentioned patent contemplating the insertion of said springs and said last-mentioned stitching as successive o rations without necessitating removal of t e chain-pockets from the position occupied during insertion of said springs.

The use of the folded strip of fabric to provide chain pockets open at but one end and arranco the last-mentioned method of insertion o'f springs followed by closure of the mouths of'said pockets effects economy of both material and labor and produces spring-filled chain pockets ready for further manipulation of the invention comprises a plurality of rows or chains of pockets or housings 17 defined by stitch-chains 18 and having their mouths closed by means of the stitch-chains 19. The slack fabric above-mentioned is indicated at 20 and is secured to the fabric sheet 21 by means, preferably, of a continuous stitch- `chain 22 for each row or chain' of pockets or housings 17 of the structure especially if the layer of'padding material 23 is disposed upon the outer face of the latter. The slack fabric portions 20 are present at both ends or tops and bottoms of the chain of spring-containing pockets or housings, the`springs 24;

of which are turned to normal positions after the stitch-chains 22 have been passed through said slack fabric portions 2,0 as described and shown.

The slack fabric 20 referred to is best shown in Fig. 13.

This attachment of the slack fabric portions 20 to the fabric sheet 21 either by means of the stitch-chains 22, or any other suitable securing means, is very advantageous for the reason that some or practically all of this,

slack is taken up and the end coils of the springs 24 are thus more closely hugged by the fabric and are far less liable to become displaced than if said slack fabric is left free. Furthermore, the pockets or housings 17 are just as firmly and durably held in proper relailo tive positions with respect to each other and the fabric sheet as if the stitch-chains 22 extended through the mouth portions of the fabric to close'the latter as illustrated in and hereinbefore described with reference to Figs. 1 to 10, inclusive.

While the housings or I pockets 17-shown 1n Figs. 11 and 12 are of t e type closed by stitch-chains at both ends, I have, in Fig. 13,

illustrated the bag-t pe of pockets or housings made from a fo ded strip of fabric and open at only one end each, the initially closed or bottom ends of said pockets or housings being selected for most clearly illustrating the slack fabric portions 20. I claim as my lnvention: p

'1. A spring assembly comprising a series of continuous rows of spring containing fabric receptacles each open at one end, a fabric sheet, and a row of fastening means passed through opposedv walls of the open end portions ofsaid receptacles andthrough said sheet for simultaneously closing said open ends of said receptacles of each row and securing said rows of receptacles to said sheet in spaced relation to each other and means operatively engaged with said sheet for preventing gathering and bunching thereof to thereby maintain said rows of spring containing receptacles in said spaced relation to each other laterally and longitudinally of said rows.

2.- A spring assembly comprising a layer of fibrous padding material, a plurality of spring containing fabric receptacles each open at one end, a sheet of .textile fabric interposed between the open ends of said receptacles and said layer of padding, and means passing through opposed walls of the open end portions of said receptacles, the fabric sheet and the padding for simultaneously closing the open ends of said receptacles and securing the latter and said padding layer to said fabric sheet, said padding constituting means for preventing gathering and bunching of said sheet and thereby maintaining the Said receptacles in said spaced relation to each other longitudinally and laterally of said sheet. v

3. A spring assembly comprising a plurality of continuous rows of spring containing fabric receptaclesv open at both ends, a pair of fabric sheets between which said receptacles are interposed, and securing means passing through-opposed walls of the respective open end portions of said receptacles and through the respective fabric sheets to simultaneously close the open ends of said recep-y tacles and secure the same respectively to said respective fabric sheets, and means operatively secured to said respective fabric sheets for preventing bunching and gathering of the same to thereby maintain said receptacles in said spaced relation to each other laterally and longitudinally of said sheets.

4. A spring assembly comprising pairs of strips of textile fabric secured together by means of stitch-chains disposedin spaced relation to each other and extending transversely of the longitudinal edges of said strips and providing a series of rows of spring receptacles open at their ends, a pair of fabric sheets between which said receptacles are in terposed, a spring in each of the latter, and rows of securing means extending transversely of said stitch-chains adjacent the respective longitudinal edges of said first-named `fabric strips and through the said fabric sheets for simultaneously closing said recep- 'tacles and securing the same to said fabric sheets and means operatively secured to said respective fabric sheets for preventing bunching and gathering of the same to thereby maintain said receptacles in said spaced rela tion to each other laterally and longitudinalof each row, and parallel sets of stitch-chains passing through the pairs of fabric strips adjacent the respective longitudinal edges of the latter and through sald respective fabric sheets in spaced relation to each other thereby simultaneously closing the ends of said receptacles to trap the contained springs and secure said rows of receptacles to said fabric sheets and means operatively secured to said respective fabric sheets for preventing bunching and gathering of the same to thereby maintain said receptacles in said spaced relation to each other laterally and longitudinally of said sheets.

6. A spring assembly includin aA fabric sheet, a layer of padding dispose upon one face of said sheet, parallel stitch chains securing said padding to said sheet, a series of fabric housin s for springs each open at one end and disposed in predetermined relative positions on the other face of said sheet,

and stitch-chains passing through said layer,

of said housings and laterally of the first mentioned stitch-chains for permanently joining said layer, sheet, and housings and closing the open ends of the latter also. and springs disposed in said housings, said paddinlg and stitch-chains coacting to prevent gat ering and bunching of said sheet and constituting means for maintaining said housings in said predetermined relative positions.

7. A spring assembly including a fabric sheet, a layer of padding disposed upon one face of said sheet, parallel stitch chains securing said padding to said sheet, a series' of fabric housings for sprin s each open at .one end and disposed in pre etermined relative positions on the other face of said sheet, and tightly drawn stitch-chains passin through said layer, said sheet and oppose walls of the open ends of said housings and laterally of the first mentioned stitch-chains for permanently joining said layer, sheet, and housings and also closin the o en ends of the latter, and com resslng an stiifening Said layer along sai stitch-chains, and springs disposed in said housings, said padding and stitch-chains coacting to prevent gathering and launching of said sheet and constituting means for maintaining said housings in said predetermined relative positions. i 8. A spring assembly including a fabric sheet, a layer of iibrous padding material secured to one face of said sheet by substantially parallel stitch-chains, a series of fabric housings for springs disposed upon the other face of said sheet in predetermined relative positions, and stitch-chains extending tra-nsversely to said first-mentioned stitch-chains through said padding, said sheet and end portions of the said housings for permanently closing the latter, compressing said layer along the last-mentioned stitch-chains and also securing'said housings to said sheet, and springs in said housings, said padding and stitch-chains coactin to prevent gathering and bunching ofsai sheet and constituting means for maintaining said housings in said predetermined relative positions.

9. A spring assembly including initially hat fabric housings for springs closed along u their side edges and ends, springs disposed in said housings and distendmg the same to substantially cylindrical form, said distend-` ed housings presenting substantially fiat, circular end walls having bag-like slack por'- tions at diametrically opposed points, a fabric sheet vopposed to one end wall of each of said housings, and stitch-chains extending substantially diametrically of and through the fabric of said end walls opposed to said sheet and through said slack portions of said end walls and throu h said sheet for securing said housings to sai sheet in predetermined positions relatively to each other, said stitchchains taking up ortions of said slack :fabric to thereby more grmly confine the end coils of springs in said pockets against lateral movement relatively tothe end walls of said pockets. p

10. A spring assembly including initially flat fabric housings forsprings closed along their side edges and ends and joined together to form chains of said housings, springs disposed in said housings and distending the same to substantially cylindrical form, said distended housings presenting substantially flat, circular end walls, free outwardly extending fabric flanges disposed diametrically of said end walls of said housings, a plurality of said chains of .housings being disposed in spaced relation to each other, a fabric sheet opposed to one end of each of said housings, of said several chains thereof fastening means securing said fabric flanges to said sheet thereby to secure said housings to said sheet in predetermined relative positions, and means secured to said sheet and enacting with said stitch-chains to prevent gathering and bunching of said she-et and thereby maintaining said housings in said spaced relation to each other.

ll. A spring assembly including springilled fabric pockets maintained normally distended .longitudinally and circumferentiall by the springs contained therein, said fabr1c pockets presenting bag-like slack fab`1 ric portions. at diametrically opposed points of each of their end walls, a sheet of textile fabric opposed t0 an end wall of each of said pockets, and means securing said slack fabric portions of the latter to said fabric sheet, said securing means taking up portions of said slack to thereby more `firmly connc vthe end coils of springs against lateral move- I nent relatively to the end walls of said housm s.

l2. A spring assembly including springflled fabric pockets maintained normally distended longitudinally and circumferentially by the springs contained therein, said fabric pockets presenting slack bag-like fabric' portions at diametrically opposed points of each of their end walls, a layer of material opposed -to an end wall of each of said pockets, and fastening means extending through said fabric sheet and said slack fabric portions of the opposed end walls of said pockets'for securing the latter to said layer and take upportions of said slack to thereby more closely rconfine the end coils of the springs against lateral movement relatively to the end walls ofsaid pockets.

13. A'spring assembly including springlled fabric pockets maintained normally distended longitudinally land circumferentially bythe springs Acontained therein, said fabric pockets presenting bag-like slack fabric portions at diametrically opposed points of. each of their end walls, a layer of fibrous padding material disposed parallel with the plane of the end Walls of said. pockets, a sheet of textile fabric interposed between said padding and said pockets, and a stitch-chain passing through said padding, said sheet of fabric and said slack fabric portions of said pockets to secure the latter and said padding to said fabric sheet and take up portions of said slack to thereby more closely confine the end coils of said springs against lateral A movement relatively to the end walls of said pockets. l

14. A spring assembly including a plural-l ity of rows of articulate distended cylindrical fabric housings having fiat end walls, a spring in each housing of each row disposed in axially spaced relation to each other, said rows relatively arranged to axially space the springs of one row a predetermined distance from the springs of a contiguous row, a flexible plane element disposed parallel withl the flat end walls of all housings of the several rows, rows of fastening means disposed substantially diametrically of the end-walls of all of the housings of the respective rows of the latter and securing the same to said flexible element, and means engaged with the latter to prevent gathering and bunching thereof and cri-acting with said fastening means to maintain said housings of the several rows thereof and maintain said several rows of housings'rmly in relative positions lll corresponding with the axial spacing of the contained springs as aforesaid.

15. A spring assembly including a plurality of rows of articulate distended cylindrical fabric housings having flat end Walls, a spring in each housing of each row disposed in axially spaced relation to eachother, said rows relatively arranged in substantially parallel relation to each other to axially space the springs of one row a predetermined distance from the springs of a contiguous row, a flexible plane element disposed parallel with the fiat end walls of all housings of the several rows, substantially parallel rows of fastening means disposed substantially diametrically of the end Walls of all of the housings of the respective rows of the latter and securing the same to said flexible element, and means engaged with the latter to prevent gathering and bunching thereof and co-acting with said fastening means to maintain said housings of the several rows thereof and maintain said several rows of housings lirm- 1y in relative positions corresponding with the axial spacing of the contained springs as aforesaid. i

In testimony whereof, I have hereunto set my hand this 21st day of July, 1930.

LOUIS A. SUEKOFF. 

